Here is a picture of what I was talking about with regard to the door frames and possible leakage (again, these are not Outfitter-specific, but rather typical for most RVs in my experience):

1 - shows the lower edge of the frame. On most frames I have seen, there was no seal of any type on the inner side of the frame. This is not really a problem on the vertical and upper edges. But any water that finds its way inside the compartment drains into the camper structure at the lower edge.
2 - two parts of the aluminum channel meet in the corners. At least on my camper, there is no sealant or the like there. While the corners are manufactured with good precision, the fit is never tight enough to be watertight here.
I apologize for the dirty appearance of our Outfitter in the picture. The camper is sitting outside all year, has been parked since October, and is in dire need of a good cleaning. The LPG bottle is a German-type rental bottle which holds 11kg. The LPG compartment was custom-built by Outfitter to fit the Euro bottle size.